summaryrefslogtreecommitdiff
path: root/src/conf_mode/vpn_ipsec.py
diff options
context:
space:
mode:
Diffstat (limited to 'src/conf_mode/vpn_ipsec.py')
-rw-r--r--src/conf_mode/vpn_ipsec.py526
1 files changed, 526 insertions, 0 deletions
diff --git a/src/conf_mode/vpn_ipsec.py b/src/conf_mode/vpn_ipsec.py
new file mode 100644
index 000000000..a359361f3
--- /dev/null
+++ b/src/conf_mode/vpn_ipsec.py
@@ -0,0 +1,526 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import ipaddress
+import os
+
+from sys import exit
+from time import sleep
+from time import time
+
+from vyos.config import Config
+from vyos.configdict import leaf_node_changed
+from vyos.configverify import verify_interface_exists
+from vyos.configdict import dict_merge
+from vyos.ifconfig import Interface
+from vyos.pki import encode_public_key
+from vyos.pki import load_private_key
+from vyos.pki import wrap_certificate
+from vyos.pki import wrap_crl
+from vyos.pki import wrap_public_key
+from vyos.pki import wrap_private_key
+from vyos.template import ip_from_cidr
+from vyos.template import render
+from vyos.validate import is_ipv6_link_local
+from vyos.util import call
+from vyos.util import dict_search_args
+from vyos.util import run
+from vyos.xml import defaults
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+dhcp_wait_attempts = 2
+dhcp_wait_sleep = 1
+
+swanctl_dir = '/etc/swanctl'
+ipsec_conf = '/etc/ipsec.conf'
+ipsec_secrets = '/etc/ipsec.secrets'
+charon_conf = '/etc/strongswan.d/charon.conf'
+charon_dhcp_conf = '/etc/strongswan.d/charon/dhcp.conf'
+interface_conf = '/etc/strongswan.d/interfaces_use.conf'
+swanctl_conf = f'{swanctl_dir}/swanctl.conf'
+
+default_install_routes = 'yes'
+
+vici_socket = '/var/run/charon.vici'
+
+CERT_PATH = f'{swanctl_dir}/x509/'
+PUBKEY_PATH = f'{swanctl_dir}/pubkey/'
+KEY_PATH = f'{swanctl_dir}/private/'
+CA_PATH = f'{swanctl_dir}/x509ca/'
+CRL_PATH = f'{swanctl_dir}/x509crl/'
+
+DHCP_BASE = '/var/lib/dhcp/dhclient'
+DHCP_HOOK_IFLIST = '/tmp/ipsec_dhcp_waiting'
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['vpn', 'ipsec']
+ l2tp_base = ['vpn', 'l2tp', 'remote-access', 'ipsec-settings']
+ if not conf.exists(base):
+ return None
+
+ # retrieve common dictionary keys
+ ipsec = conf.get_config_dict(base, key_mangling=('-', '_'),
+ get_first_key=True, no_tag_node_value_mangle=True)
+
+ # We have gathered the dict representation of the CLI, but there are default
+ # options which we need to update into the dictionary retrived.
+ default_values = defaults(base)
+ # XXX: T2665: we must safely remove default values for tag nodes, those are
+ # added in a more fine grained way later on
+ del default_values['esp_group']
+ del default_values['ike_group']
+ del default_values['remote_access']
+ ipsec = dict_merge(default_values, ipsec)
+
+ if 'esp_group' in ipsec:
+ default_values = defaults(base + ['esp-group'])
+ for group in ipsec['esp_group']:
+ ipsec['esp_group'][group] = dict_merge(default_values,
+ ipsec['esp_group'][group])
+ if 'ike_group' in ipsec:
+ default_values = defaults(base + ['ike-group'])
+ for group in ipsec['ike_group']:
+ ipsec['ike_group'][group] = dict_merge(default_values,
+ ipsec['ike_group'][group])
+ if 'remote_access' in ipsec:
+ default_values = defaults(base + ['remote-access'])
+ for rw in ipsec['remote_access']:
+ ipsec['remote_access'][rw] = dict_merge(default_values,
+ ipsec['remote_access'][rw])
+
+ ipsec['dhcp_no_address'] = {}
+ ipsec['install_routes'] = 'no' if conf.exists(base + ["options", "disable-route-autoinstall"]) else default_install_routes
+ ipsec['interface_change'] = leaf_node_changed(conf, base + ['interface'])
+ ipsec['nhrp_exists'] = conf.exists(['protocols', 'nhrp', 'tunnel'])
+ ipsec['pki'] = conf.get_config_dict(['pki'], key_mangling=('-', '_'),
+ get_first_key=True,
+ no_tag_node_value_mangle=True)
+
+ ipsec['l2tp'] = conf.get_config_dict(l2tp_base, key_mangling=('-', '_'),
+ get_first_key=True,
+ no_tag_node_value_mangle=True)
+ if ipsec['l2tp']:
+ l2tp_defaults = defaults(l2tp_base)
+ ipsec['l2tp'] = dict_merge(l2tp_defaults, ipsec['l2tp'])
+ ipsec['l2tp_outside_address'] = conf.return_value(['vpn', 'l2tp', 'remote-access', 'outside-address'])
+ ipsec['l2tp_ike_default'] = 'aes256-sha1-modp1024,3des-sha1-modp1024,3des-sha1-modp1024'
+ ipsec['l2tp_esp_default'] = 'aes256-sha1,3des-sha1'
+
+ return ipsec
+
+def get_dhcp_address(iface):
+ addresses = Interface(iface).get_addr()
+ if not addresses:
+ return None
+ for address in addresses:
+ if not is_ipv6_link_local(address):
+ return ip_from_cidr(address)
+ return None
+
+def verify_pki_x509(pki, x509_conf):
+ if not pki or 'ca' not in pki or 'certificate' not in pki:
+ raise ConfigError(f'PKI is not configured')
+
+ ca_cert_name = x509_conf['ca_certificate']
+ cert_name = x509_conf['certificate']
+
+ if not dict_search_args(pki, 'ca', ca_cert_name, 'certificate'):
+ raise ConfigError(f'Missing CA certificate on specified PKI CA certificate "{ca_cert_name}"')
+
+ if not dict_search_args(pki, 'certificate', cert_name, 'certificate'):
+ raise ConfigError(f'Missing certificate on specified PKI certificate "{cert_name}"')
+
+ if not dict_search_args(pki, 'certificate', cert_name, 'private', 'key'):
+ raise ConfigError(f'Missing private key on specified PKI certificate "{cert_name}"')
+
+ return True
+
+def verify_pki_rsa(pki, rsa_conf):
+ if not pki or 'key_pair' not in pki:
+ raise ConfigError(f'PKI is not configured')
+
+ local_key = rsa_conf['local_key']
+ remote_key = rsa_conf['remote_key']
+
+ if not dict_search_args(pki, 'key_pair', local_key, 'private', 'key'):
+ raise ConfigError(f'Missing private key on specified local-key "{local_key}"')
+
+ if not dict_search_args(pki, 'key_pair', remote_key, 'public', 'key'):
+ raise ConfigError(f'Missing public key on specified remote-key "{remote_key}"')
+
+ return True
+
+def verify(ipsec):
+ if not ipsec:
+ return None
+
+ if 'interfaces' in ipsec :
+ for ifname in ipsec['interface']:
+ verify_interface_exists(ifname)
+
+ if ipsec['l2tp']:
+ if 'esp_group' in ipsec['l2tp']:
+ if 'esp_group' not in ipsec or ipsec['l2tp']['esp_group'] not in ipsec['esp_group']:
+ raise ConfigError(f"Invalid esp-group on L2TP remote-access config")
+
+ if 'ike_group' in ipsec['l2tp']:
+ if 'ike_group' not in ipsec or ipsec['l2tp']['ike_group'] not in ipsec['ike_group']:
+ raise ConfigError(f"Invalid ike-group on L2TP remote-access config")
+
+ if 'authentication' not in ipsec['l2tp']:
+ raise ConfigError(f'Missing authentication settings on L2TP remote-access config')
+
+ if 'mode' not in ipsec['l2tp']['authentication']:
+ raise ConfigError(f'Missing authentication mode on L2TP remote-access config')
+
+ if not ipsec['l2tp_outside_address']:
+ raise ConfigError(f'Missing outside-address on L2TP remote-access config')
+
+ if ipsec['l2tp']['authentication']['mode'] == 'pre-shared-secret':
+ if 'pre_shared_secret' not in ipsec['l2tp']['authentication']:
+ raise ConfigError(f'Missing pre shared secret on L2TP remote-access config')
+
+ if ipsec['l2tp']['authentication']['mode'] == 'x509':
+ if 'x509' not in ipsec['l2tp']['authentication']:
+ raise ConfigError(f'Missing x509 settings on L2TP remote-access config')
+
+ x509 = ipsec['l2tp']['authentication']['x509']
+
+ if 'ca_certificate' not in x509 or 'certificate' not in x509:
+ raise ConfigError(f'Missing x509 certificates on L2TP remote-access config')
+
+ verify_pki_x509(ipsec['pki'], x509)
+
+ if 'profile' in ipsec:
+ for profile, profile_conf in ipsec['profile'].items():
+ if 'esp_group' in profile_conf:
+ if 'esp_group' not in ipsec or profile_conf['esp_group'] not in ipsec['esp_group']:
+ raise ConfigError(f"Invalid esp-group on {profile} profile")
+ else:
+ raise ConfigError(f"Missing esp-group on {profile} profile")
+
+ if 'ike_group' in profile_conf:
+ if 'ike_group' not in ipsec or profile_conf['ike_group'] not in ipsec['ike_group']:
+ raise ConfigError(f"Invalid ike-group on {profile} profile")
+ else:
+ raise ConfigError(f"Missing ike-group on {profile} profile")
+
+ if 'authentication' not in profile_conf:
+ raise ConfigError(f"Missing authentication on {profile} profile")
+
+ if 'remote_access' in ipsec:
+ for name, ra_conf in ipsec['remote_access'].items():
+ if 'esp_group' in ra_conf:
+ if 'esp_group' not in ipsec or ra_conf['esp_group'] not in ipsec['esp_group']:
+ raise ConfigError(f"Invalid esp-group on {name} remote-access config")
+ else:
+ raise ConfigError(f"Missing esp-group on {name} remote-access config")
+
+ if 'ike_group' in ra_conf:
+ if 'ike_group' not in ipsec or ra_conf['ike_group'] not in ipsec['ike_group']:
+ raise ConfigError(f"Invalid ike-group on {name} remote-access config")
+ else:
+ raise ConfigError(f"Missing ike-group on {name} remote-access config")
+
+ if 'authentication' not in ra_conf:
+ raise ConfigError(f"Missing authentication on {name} remote-access config")
+
+ if ra_conf['authentication']['server_mode'] == 'x509':
+ if 'x509' not in ra_conf['authentication']:
+ raise ConfigError(f"Missing x509 settings on {name} remote-access config")
+
+ x509 = ra_conf['authentication']['x509']
+
+ if 'ca_certificate' not in x509 or 'certificate' not in x509:
+ raise ConfigError(f"Missing x509 certificates on {name} remote-access config")
+
+ verify_pki_x509(ipsec['pki'], x509)
+ elif ra_conf['authentication']['server_mode'] == 'pre-shared-secret':
+ if 'pre_shared_secret' not in ra_conf['authentication']:
+ raise ConfigError(f"Missing pre-shared-key on {name} remote-access config")
+
+ if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']:
+ for peer, peer_conf in ipsec['site_to_site']['peer'].items():
+ has_default_esp = False
+ if 'default_esp_group' in peer_conf:
+ has_default_esp = True
+ if 'esp_group' not in ipsec or peer_conf['default_esp_group'] not in ipsec['esp_group']:
+ raise ConfigError(f"Invalid esp-group on site-to-site peer {peer}")
+
+ if 'ike_group' in peer_conf:
+ if 'ike_group' not in ipsec or peer_conf['ike_group'] not in ipsec['ike_group']:
+ raise ConfigError(f"Invalid ike-group on site-to-site peer {peer}")
+ else:
+ raise ConfigError(f"Missing ike-group on site-to-site peer {peer}")
+
+ if 'authentication' not in peer_conf or 'mode' not in peer_conf['authentication']:
+ raise ConfigError(f"Missing authentication on site-to-site peer {peer}")
+
+ if peer_conf['authentication']['mode'] == 'x509':
+ if 'x509' not in peer_conf['authentication']:
+ raise ConfigError(f"Missing x509 settings on site-to-site peer {peer}")
+
+ x509 = peer_conf['authentication']['x509']
+
+ if 'ca_certificate' not in x509 or 'certificate' not in x509:
+ raise ConfigError(f"Missing x509 certificates on site-to-site peer {peer}")
+
+ verify_pki_x509(ipsec['pki'], x509)
+ elif peer_conf['authentication']['mode'] == 'rsa':
+ if 'rsa' not in peer_conf['authentication']:
+ raise ConfigError(f"Missing RSA settings on site-to-site peer {peer}")
+
+ rsa = peer_conf['authentication']['rsa']
+
+ if 'local_key' not in rsa:
+ raise ConfigError(f"Missing RSA local-key on site-to-site peer {peer}")
+
+ if 'remote_key' not in rsa:
+ raise ConfigError(f"Missing RSA remote-key on site-to-site peer {peer}")
+
+ verify_pki_rsa(ipsec['pki'], rsa)
+
+ if 'local_address' not in peer_conf and 'dhcp_interface' not in peer_conf:
+ raise ConfigError(f"Missing local-address or dhcp-interface on site-to-site peer {peer}")
+
+ if 'dhcp_interface' in peer_conf:
+ dhcp_interface = peer_conf['dhcp_interface']
+
+ verify_interface_exists(dhcp_interface)
+
+ if not os.path.exists(f'{DHCP_BASE}_{dhcp_interface}.conf'):
+ raise ConfigError(f"Invalid dhcp-interface on site-to-site peer {peer}")
+
+ address = get_dhcp_address(dhcp_interface)
+ count = 0
+ while not address and count < dhcp_wait_attempts:
+ address = get_dhcp_address(dhcp_interface)
+ count += 1
+ sleep(dhcp_wait_sleep)
+
+ if not address:
+ ipsec['dhcp_no_address'][peer] = dhcp_interface
+ print(f"Failed to get address from dhcp-interface on site-to-site peer {peer} -- skipped")
+ continue
+
+ if 'vti' in peer_conf:
+ if 'local_address' in peer_conf and 'dhcp_interface' in peer_conf:
+ raise ConfigError(f"A single local-address or dhcp-interface is required when using VTI on site-to-site peer {peer}")
+
+ if 'bind' in peer_conf['vti']:
+ vti_interface = peer_conf['vti']['bind']
+ if not os.path.exists(f'/sys/class/net/{vti_interface}'):
+ raise ConfigError(f'VTI interface {vti_interface} for site-to-site peer {peer} does not exist!')
+
+ if 'vti' not in peer_conf and 'tunnel' not in peer_conf:
+ raise ConfigError(f"No VTI or tunnel specified on site-to-site peer {peer}")
+
+ if 'tunnel' in peer_conf:
+ for tunnel, tunnel_conf in peer_conf['tunnel'].items():
+ if 'esp_group' not in tunnel_conf and not has_default_esp:
+ raise ConfigError(f"Missing esp-group on tunnel {tunnel} for site-to-site peer {peer}")
+
+ esp_group_name = tunnel_conf['esp_group'] if 'esp_group' in tunnel_conf else peer_conf['default_esp_group']
+
+ if esp_group_name not in ipsec['esp_group']:
+ raise ConfigError(f"Invalid esp-group on tunnel {tunnel} for site-to-site peer {peer}")
+
+ esp_group = ipsec['esp_group'][esp_group_name]
+
+ if 'mode' in esp_group and esp_group['mode'] == 'transport':
+ if 'protocol' in tunnel_conf and ((peer in ['any', '0.0.0.0']) or ('local_address' not in peer_conf or peer_conf['local_address'] in ['any', '0.0.0.0'])):
+ raise ConfigError(f"Fixed local-address or peer required when a protocol is defined with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}")
+
+ if ('local' in tunnel_conf and 'prefix' in tunnel_conf['local']) or ('remote' in tunnel_conf and 'prefix' in tunnel_conf['remote']):
+ raise ConfigError(f"Local/remote prefix cannot be used with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}")
+
+def cleanup_pki_files():
+ for path in [CERT_PATH, CA_PATH, CRL_PATH, KEY_PATH, PUBKEY_PATH]:
+ if not os.path.exists(path):
+ continue
+ for file in os.listdir(path):
+ file_path = os.path.join(path, file)
+ if os.path.isfile(file_path):
+ os.unlink(file_path)
+
+def generate_pki_files_x509(pki, x509_conf):
+ ca_cert_name = x509_conf['ca_certificate']
+ ca_cert_data = dict_search_args(pki, 'ca', ca_cert_name, 'certificate')
+ ca_cert_crls = dict_search_args(pki, 'ca', ca_cert_name, 'crl') or []
+ crl_index = 1
+
+ cert_name = x509_conf['certificate']
+ cert_data = dict_search_args(pki, 'certificate', cert_name, 'certificate')
+ key_data = dict_search_args(pki, 'certificate', cert_name, 'private', 'key')
+ protected = 'passphrase' in x509_conf
+
+ with open(os.path.join(CA_PATH, f'{ca_cert_name}.pem'), 'w') as f:
+ f.write(wrap_certificate(ca_cert_data))
+
+ for crl in ca_cert_crls:
+ with open(os.path.join(CRL_PATH, f'{ca_cert_name}_{crl_index}.pem'), 'w') as f:
+ f.write(wrap_crl(crl))
+ crl_index += 1
+
+ with open(os.path.join(CERT_PATH, f'{cert_name}.pem'), 'w') as f:
+ f.write(wrap_certificate(cert_data))
+
+ with open(os.path.join(KEY_PATH, f'x509_{cert_name}.pem'), 'w') as f:
+ f.write(wrap_private_key(key_data, protected))
+
+def generate_pki_files_rsa(pki, rsa_conf):
+ local_key_name = rsa_conf['local_key']
+ local_key_data = dict_search_args(pki, 'key_pair', local_key_name, 'private', 'key')
+ protected = 'passphrase' in rsa_conf
+ remote_key_name = rsa_conf['remote_key']
+ remote_key_data = dict_search_args(pki, 'key_pair', remote_key_name, 'public', 'key')
+
+ local_key = load_private_key(local_key_data, rsa_conf['passphrase'] if protected else None)
+
+ with open(os.path.join(KEY_PATH, f'rsa_{local_key_name}.pem'), 'w') as f:
+ f.write(wrap_private_key(local_key_data, protected))
+
+ with open(os.path.join(PUBKEY_PATH, f'{local_key_name}.pem'), 'w') as f:
+ f.write(encode_public_key(local_key.public_key()))
+
+ with open(os.path.join(PUBKEY_PATH, f'{remote_key_name}.pem'), 'w') as f:
+ f.write(wrap_public_key(remote_key_data))
+
+def generate(ipsec):
+ cleanup_pki_files()
+
+ if not ipsec:
+ for config_file in [ipsec_conf, ipsec_secrets, charon_dhcp_conf, interface_conf, swanctl_conf]:
+ if os.path.isfile(config_file):
+ os.unlink(config_file)
+ render(charon_conf, 'ipsec/charon.tmpl', {'install_routes': default_install_routes})
+ return
+
+ if ipsec['dhcp_no_address']:
+ with open(DHCP_HOOK_IFLIST, 'w') as f:
+ f.write(" ".join(ipsec['dhcp_no_address'].values()))
+
+ for path in [swanctl_dir, CERT_PATH, CA_PATH, CRL_PATH, PUBKEY_PATH]:
+ if not os.path.exists(path):
+ os.mkdir(path, mode=0o755)
+
+ if not os.path.exists(KEY_PATH):
+ os.mkdir(KEY_PATH, mode=0o700)
+
+ if ipsec['l2tp']:
+ if 'authentication' in ipsec['l2tp'] and 'x509' in ipsec['l2tp']['authentication']:
+ generate_pki_files_x509(ipsec['pki'], ipsec['l2tp']['authentication']['x509'])
+
+ if 'remote_access' in ipsec:
+ for rw, rw_conf in ipsec['remote_access'].items():
+ if 'authentication' in rw_conf and 'x509' in rw_conf['authentication']:
+ generate_pki_files_x509(ipsec['pki'], rw_conf['authentication']['x509'])
+
+ if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']:
+ for peer, peer_conf in ipsec['site_to_site']['peer'].items():
+ if peer in ipsec['dhcp_no_address']:
+ continue
+
+ if peer_conf['authentication']['mode'] == 'x509':
+ generate_pki_files_x509(ipsec['pki'], peer_conf['authentication']['x509'])
+ elif peer_conf['authentication']['mode'] == 'rsa':
+ generate_pki_files_rsa(ipsec['pki'], peer_conf['authentication']['rsa'])
+
+ local_ip = ''
+ if 'local_address' in peer_conf:
+ local_ip = peer_conf['local_address']
+ elif 'dhcp_interface' in peer_conf:
+ local_ip = get_dhcp_address(peer_conf['dhcp_interface'])
+
+ ipsec['site_to_site']['peer'][peer]['local_address'] = local_ip
+
+ if 'tunnel' in peer_conf:
+ for tunnel, tunnel_conf in peer_conf['tunnel'].items():
+ local_prefixes = dict_search_args(tunnel_conf, 'local', 'prefix')
+ remote_prefixes = dict_search_args(tunnel_conf, 'remote', 'prefix')
+
+ if not local_prefixes or not remote_prefixes:
+ continue
+
+ passthrough = []
+
+ for local_prefix in local_prefixes:
+ for remote_prefix in remote_prefixes:
+ local_net = ipaddress.ip_network(local_prefix)
+ remote_net = ipaddress.ip_network(remote_prefix)
+ if local_net.overlaps(remote_net):
+ passthrough.append(local_prefix)
+
+ ipsec['site_to_site']['peer'][peer]['tunnel'][tunnel]['passthrough'] = passthrough
+
+
+ render(ipsec_conf, 'ipsec/ipsec.conf.tmpl', ipsec)
+ render(ipsec_secrets, 'ipsec/ipsec.secrets.tmpl', ipsec)
+ render(charon_conf, 'ipsec/charon.tmpl', ipsec)
+ render(charon_dhcp_conf, 'ipsec/charon/dhcp.conf.tmpl', ipsec)
+ render(interface_conf, 'ipsec/interfaces_use.conf.tmpl', ipsec)
+ render(swanctl_conf, 'ipsec/swanctl.conf.tmpl', ipsec)
+
+def resync_nhrp(ipsec):
+ if ipsec and not ipsec['nhrp_exists']:
+ return
+
+ tmp = run('/usr/libexec/vyos/conf_mode/protocols_nhrp.py')
+ if tmp > 0:
+ print('ERROR: failed to reapply NHRP settings!')
+
+def wait_for_vici_socket(timeout=5, sleep_interval=0.1):
+ start_time = time()
+ test_command = f'sudo socat -u OPEN:/dev/null UNIX-CONNECT:{vici_socket}'
+ while True:
+ if (start_time + timeout) < time():
+ return None
+ result = run(test_command)
+ if result == 0:
+ return True
+ sleep(sleep_interval)
+
+def apply(ipsec):
+ if not ipsec:
+ call('sudo ipsec stop')
+ else:
+ args = ''
+ if 'auto_update' in ipsec:
+ args = '--auto-update ' + ipsec['auto_update']
+ call(f'sudo ipsec restart {args}')
+ call('sudo ipsec rereadall')
+ call('sudo ipsec reload')
+
+ if wait_for_vici_socket():
+ call('sudo swanctl -q')
+
+ resync_nhrp(ipsec)
+
+if __name__ == '__main__':
+ try:
+ ipsec = get_config()
+ verify(ipsec)
+ generate(ipsec)
+ apply(ipsec)
+ except ConfigError as e:
+ print(e)
+ exit(1)